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SECTION 11

Things Living Where They Shouldn't Be

11.1 Purpose

HVAC equipment is designed to contain things such as:

  • Motors.
  • Compressors.
  • Coils.
  • Electrical components.
  • Refrigerant.
  • Air.
  • Water, but only in very specific places.

It is not designed to contain:

  • Rats.
  • Mice.
  • Snakes.
  • Frogs.
  • Lizards.
  • Ants.
  • Wasps.
  • Bees.
  • Roaches.
  • Birds.
  • Nests.
  • Eggs of unknown origin.
  • Anything with a face that looks surprised to see you.

Unfortunately, the animals of Florida have not reviewed the installation manual.

Klein Cooling technicians shall recognize that animals, insects, nests, waste, and other biological material can affect equipment operation, damage components, create electrical faults, obstruct airflow or drainage, and create conditions that may be unsafe to service.

We diagnose the HVAC equipment.

We document what we find.

We do not unnecessarily endanger ourselves because something with teeth has decided the condenser is beachfront property.

OPERATING PRINCIPLE

If something is living inside the equipment, determine whether it affected the equipment.

Do not become part of the ecosystem.


11.2 First: Is It Alive?

This is useful information.

When opening equipment and discovering an unexpected occupant, there are generally two initial classifications:

A. Alive

B. No longer alive

These present different problems.

A dead frog across electrical terminals may explain why the equipment stopped operating.

A live frog sitting beside those terminals presents an additional question:

Where is he going next?

Before reaching farther into the compartment, evaluate the situation.


11.3 The Equipment May Already Be Occupied

Before reaching blindly into:

  • Electrical compartments.
  • Disconnects.
  • Condensing units.
  • Air handlers.
  • Attic equipment.
  • Crawlspaces.
  • Dark openings.
  • Areas containing nests or droppings.

Look first.

Especially when there is evidence of animal activity.

The fact that you cannot currently see the animal does not establish that the animal has left.

It may simply establish that:

the animal can see you better than you can see it.


11.4 The Frog

Florida HVAC equipment occasionally contains frogs.

The frog is not OEM.

A frog may simply be present.

It may also have:

  • Contacted electrical components.
  • Bridged terminals.
  • Caused a short.
  • Damaged itself.
  • Damaged the equipment.
  • Created contamination.
  • Been completely uninvolved and simply selected a terrible apartment.

Determine what actually happened.

Do not automatically document:

Frog caused failure.

unless the evidence supports that conclusion.

Sometimes the frog is the cause.

Sometimes the frog is merely:

at the scene of the crime.


11.5 Ants and Electrical Components

Ants may enter electrical compartments and can contribute to problems involving contactors, relays, controls, and other electrical components.

If insect contamination is present:

Inspect the affected equipment.

Determine whether the component has actually failed or been affected.

Do not automatically replace a contactor because:

“There are ants around it.”

Likewise, do not clean out the ants, watch the equipment restart, and assume the problem is permanently resolved without inspecting the component.

The ants may have left.

Their work may remain.


11.6 Wasps, Bees and Other Flying Negotiators

Technicians may encounter nests in:

  • Disconnects.
  • Condensers.
  • Equipment cabinets.
  • Attics.
  • Sheds.
  • Areas immediately surrounding equipment.

If opening a disconnect causes several angry insects to exit:

Close the disconnect if safely possible and reconsider the immediate plan.

Do not:

  • Swing your meter leads at them.
  • Attempt electrical diagnosis while being attacked.
  • Announce that you’re “not allergic” as though this creates armor.
  • Climb higher onto a ladder to improve the situation.
  • Challenge the nest.

You are being paid to diagnose an air conditioner.

Not establish dominance over a colony of wasps.

OPERATING PRINCIPLE

The service call can wait until the technician can safely perform the service call.


11.7 Eggs of Unknown Origin

Occasionally, a technician will open:

  • A disconnect.
  • Control compartment.
  • Condensing unit.
  • Air handler.
  • Electrical enclosure.

and discover:

Eggs.

What kind?

Unknown.

What laid them?

Unknown.

Is their mother nearby?

An excellent question that we have no interest in answering experimentally.

Do not:

  • Touch them unnecessarily.
  • Crush one to “see what’s inside.”
  • Put one in your pocket.
  • Bring one back to the shop.
  • Ask another technician to smell it.
  • Confidently identify the species based on something you saw online.
  • Continue reaching blindly into the compartment while wondering where Mom went.

Document the condition.

Determine whether the material interferes with safe equipment operation or service.

If removal can be performed safely and appropriately within our scope, address what is necessary to service the equipment.

If pest or wildlife removal is required:

That belongs to someone else.

APPROVED DOCUMENTATION

Eggs of unknown origin observed inside disconnect.

This is sufficient.

Not:

“Probably lizard.”

Not:

“Maybe snake.”

Not:

“I think these are fine.”

And definitely not:

“Let’s open one.”

OPERATING PRINCIPLE

If eggs are inside electrical equipment, something put them there.

There is a non-zero possibility that something still knows where they are.


11.8 Snakes

If you encounter a snake:

Stop and evaluate the situation.

Do not attempt to handle wildlife you are not trained or equipped to handle.

Do not reach into an area where a snake has disappeared.

Do not attempt to continue servicing equipment while monitoring the snake with one eye.

You are an HVAC technician.

You are not Animal Control with gauges.

11.8.1 “What Kind of Snake Is It?”

For immediate field purposes, there are two useful classifications:

Snake.

No snake.

If there is currently a snake between you and the component requiring service:

We have snake.

Specific identification can be left to someone qualified to make that determination when necessary.


11.9 Unidentified Attic Participants

Customer:

“There’s something living in the attic.”

Ask questions.

Customer:

“I haven’t heard it in a few days.”

That did not answer the question.

Customer:

“It’s probably just a squirrel.”

The word probably is doing substantial work in that sentence.

Before entering an attic with known or suspected animal activity:

Evaluate the conditions.

Look for:

  • Droppings.
  • Nests.
  • Damaged ductwork.
  • Chewed wiring.
  • Disturbed insulation.
  • Animal access points.
  • Other obvious evidence.

If conditions are unsafe:

Do not proceed merely because the air handler happens to be located up there.


11.10 Rodents

Rodents can cause legitimate HVAC failures.

They may damage:

  • Low-voltage wiring.
  • Line-voltage wiring.
  • Sensor wiring.
  • Pressure-switch wiring.
  • Insulation.
  • Ductwork.
  • Control wiring.
  • Drain components.
  • Other accessible materials.

If rodent damage is found:

Do not stop at the first damaged wire.

Inspect accessible affected areas for additional damage.

One chewed conductor establishes that a rodent has been chewing conductors.

It does not establish that the rodent carefully limited its work to one.


11.11 When the Equipment Has Become a Residence

Sometimes an animal is not merely passing through.

It lives there.

Technicians may encounter:

  • Nesting material.
  • Food storage.
  • Droppings.
  • Bedding.
  • Multiple animals.
  • Multiple generations.
  • Evidence that the equipment has become a permanent residence.

At this point:

The HVAC equipment has acquired tenants.

The technician’s responsibility is to determine what effect this has had on the HVAC system and whether the equipment can be serviced safely.

The technician’s responsibility does not include eviction.


11.12 THIS ACTUALLY HAPPENED — THE RAT CONDENSER

This is not a hypothetical example.

A Klein Cooling technician discovered:

A family of rats living inside a condensing unit.

They had chewed through the:

pressure-switch wiring.

The rodents were not merely near the equipment.

They were not merely underneath the equipment.

They were not innocent bystanders.

They lived in the condenser.

They performed electrical work.

And they caused an actual equipment problem.

They were not licensed.


11.13 The Rats Are Not the Diagnosis

Even when the cause appears obvious:

Inspect the damage.

In the rat-condensing-unit example, the technician must still determine:

  • Which conductors were damaged.
  • Whether copper is exposed.
  • Whether conductors shorted.
  • Whether pressure-switch wiring was interrupted.
  • Whether additional wiring was damaged.
  • Whether components were affected.
  • Whether contamination affects safe service.
  • Whether the equipment can be properly repaired.

Do not document:

Rats.

and consider the diagnosis complete.

The rats are evidence.

Determine what the rats actually did.


11.14 The Rat Is Also Not the Repair

Repairing rodent-damaged HVAC wiring may restore operation.

It does not resolve an active rodent infestation.

These are two separate problems.

Explain that clearly.

Example:

“The no-cool condition is being caused by damaged pressure-switch wiring. There is also evidence of rodent activity inside the condensing unit. We can address the HVAC damage, but the rodent issue itself needs to be addressed separately.”

We repair HVAC systems.

We do not evict tenants.


11.15 Do Not Negotiate With the Residents

If live rodents are currently occupying the equipment:

Do not:

  • Grab them.
  • Chase them through the condenser.
  • Poke them with a screwdriver.
  • Reach blindly into their residence.
  • Attempt to determine which one is the father.
  • Offer financing.
  • Ask whether they would like to hear about the maintenance plan.

They are not the customer.

Although apparently:

they have been using the equipment.


11.16 Rodent-Damage Documentation

Good:

Evidence of rodent activity observed inside condensing unit. Pressure-switch wiring visibly damaged by chewing. Additional accessible wiring inspected for visible damage. Recommend addressing rodent activity and completing applicable HVAC wiring repairs. Photos documented.

Not:

Rats fucked it up.

Accurate?

Potentially.

Suitable for the customer’s permanent service history?

We’re going to polish it.


11.17 Nests

Bird, rodent, insect, or other nests may interfere with:

  • Electrical components.
  • Airflow.
  • Condenser fan operation.
  • Drainage.
  • Service access.
  • Safe equipment operation.

Determine whether the nest is affecting the HVAC system.

Do not destroy or remove active wildlife nests when doing so would be unsafe, inappropriate, or outside our scope.

If wildlife removal is required:

Recommend the appropriate outside service.

Again:

HVAC company.

The logo on the truck does not contain a raccoon.


11.18 Dead Animals

Occasionally, the thing living where it shouldn’t be is no longer living.

This may create:

  • Odor.
  • Contamination.
  • Air-quality complaints.
  • Drainage issues.
  • Equipment contamination.
  • Customer distress.

Determine whether the condition affects HVAC equipment or air distribution.

Do not make health claims outside our expertise.

Do not tell a customer:

“That’s definitely what you’re smelling.”

unless you have actually established that.

There are many terrible smells in an attic.

We do not need to guess.


11.19 The Smell

Customer:

“Something died in my ductwork.”

Maybe.

Ask questions.

Determine:

  • Where the odor is strongest.
  • Whether it occurs only when the blower operates.
  • Whether it is localized.
  • Whether accessible HVAC components show evidence.
  • Whether there are other plausible sources.

Do not immediately begin dismantling ductwork because:

“Smells dead.”

That is a description.

Not yet a location.


11.20 Droppings and Contamination

Animal droppings or other biological contamination may present conditions requiring additional precautions or outside remediation.

Do not:

  • Stir up contamination unnecessarily.
  • Blow it through the home.
  • Handle significant contamination casually.
  • Continue working in conditions you reasonably believe are unsafe.

Document conditions affecting the HVAC scope.

If appropriate remediation is required before HVAC work can safely continue:

Explain that to the customer.

The air conditioner can wait.


11.21 Damaged Ductwork

Animals may:

  • Tear flexible duct.
  • Damage insulation.
  • Enter duct systems.
  • Damage vapor barriers.
  • Pull duct connections apart.
  • Create openings.
  • Nest around ductwork.

If animal damage is found:

Document the actual condition.

Good:

Approximately 6-inch tear observed in accessible flex duct outer jacket; insulation disturbed and inner liner requires further inspection.

Not:

Raccoon destroyed ducts.

Unless you personally witnessed a raccoon performing demolition, document what you know.

See Section 07.


11.22 Do Not Blame Wildlife Without Evidence

A lizard near a failed capacitor does not mean:

Lizard killed capacitor.

A frog inside a condenser does not automatically mean:

Frog caused no-cool.

A rat dropping near a wire does not automatically mean:

Rat chewed wire.

Look for evidence.

Document evidence.

Then establish the relationship to the failure.

OPERATING PRINCIPLE

Presence is not causation.

Even when the suspect has a tail.


11.23 Do Not Repair Around an Active Hazard

If an animal or infestation prevents safe access to the equipment:

Stop.

Explain the condition.

Document it.

Recommend that the condition be addressed before HVAC service continues when appropriate.

Do not put your hand somewhere unsafe because:

“I can probably reach the contactor from here.”

Probably is not an electrical safety procedure.


11.24 The Customer May Be Completely Unbothered

Technician:

“There is a snake beside the air handler.”

Customer:

“Oh yeah. He’s been up there.”

This does not change the standard.

The customer’s comfort with the animal does not establish the technician’s obligation to work beside it.

Likewise:

“The wasps don’t usually bother anybody.”

is useful historical information.

It is not PPE.


11.25 The Customer May Be Extremely Bothered

The opposite also happens.

Customer:

“THERE’S A LIZARD IN THE CONDENSER.”

Remain calm.

Evaluate the situation.

Do not unnecessarily escalate harmless conditions.

A small lizard near outdoor equipment does not automatically require:

  • Emergency shutdown.
  • Replacement.
  • Evacuation.
  • Prayer circle.
  • National Guard.

Determine whether it actually affects the equipment.


11.26 Do Not Become Pest Control

Klein Cooling technicians may encounter pests while performing HVAC work.

That does not make Klein Cooling a pest-control or wildlife-removal company.

Our responsibility is to:

  1. Recognize the condition.
  2. Determine whether it affects HVAC operation.
  3. Determine whether HVAC service can proceed safely.
  4. Document relevant findings.
  5. Repair HVAC-related damage within our scope.
  6. Recommend appropriate outside assistance when necessary.

We do not need to solve every problem discovered on the property.

Sometimes the correct professional diagnosis is:

“You need an exterminator before we continue.”


11.27 Pictures Are Your Friend

When appropriate and safe:

Photograph unusual conditions.

Especially:

  • Chewed wiring.
  • Nests.
  • Contamination.
  • Damaged ductwork.
  • Animal-related equipment damage.
  • Eggs of unknown origin.
  • Anything the next technician will otherwise believe you made up.

Photos help:

  • Explain findings to the customer.
  • Document equipment condition.
  • Support repair recommendations.
  • Preserve evidence after the animal has departed.

And occasionally:

Provide proof to the office that:

Yes, there really was a family of rats living in the condenser.


11.28 Service Notes

Service notes should describe the relevant HVAC condition professionally.

Good:

Rodent damage observed to low-voltage wiring inside outdoor unit.

Good:

Insect contamination observed inside contactor; contactor inspected and tested.

Good:

Nest obstructing safe access to electrical compartment. Recommend pest/wildlife removal before further service.

Good:

Eggs of unknown origin observed inside disconnect. No contact with electrical terminals observed.

Not:

Some weird shit living in there.

Again:

Potentially accurate.

Not the invoice.


11.29 THIS ACTUALLY HAPPENED

When a real Klein Cooling service call is bizarre enough to sound invented, we may identify it internally as:

THIS ACTUALLY HAPPENED

These examples exist for a reason.

They teach technicians that unusual conditions are not automatically irrelevant.

A family of rats can cause a pressure-switch circuit failure.

An animal can damage wiring.

An insect can interfere with electrical components.

A nest can obstruct equipment.

Eggs can appear in a disconnect for reasons nobody asked for.

The humor is optional.

The diagnostic relevance is not.


11.30 The Klein Cooling Wildlife Test

When discovering something living—or formerly living—where it should not be, ask:

Is it alive?

Is it safe to continue?

Does it prevent safe access?

Has it affected the HVAC equipment?

What actual damage is present?

Did I inspect accessible areas for additional related damage?

Am I assuming causation merely because an animal is present?

Does the condition require pest or wildlife removal?

Can the HVAC repair proceed independently?

Did I document the condition?

Did I photograph it when appropriate?

And, when applicable:

Where is its mother?

If the answer to the last question is:

“I don’t know.”

perhaps stop reaching into the disconnect.


11.31 Final Standard

If it has:

  • Fur.
  • Feathers.
  • Scales.
  • Wings.
  • A stinger.
  • A tail.
  • More legs than expected.
  • Fewer legs than expected.
  • Eggs.
  • Teeth.
  • Or an expression suggesting that you have entered its mechanical room:

Assess the situation before proceeding.

Protect yourself.

Protect the customer.

Protect the equipment.

Determine what actually happened.

Document actual damage.

Do not invent causation.

Do not become pest control.

Do not become wildlife removal.

Do not touch eggs to satisfy your curiosity.

Do not chase rats through a condenser.

Do not fight wasps with meter leads.

Do not identify snakes while standing next to them.

And if a family of rats has moved into a condensing unit and begun chewing through pressure-switch wiring:

Yes.

That is relevant to the no-cool call.

OPERATING PRINCIPLE

If an animal has begun altering the factory wiring, it is no longer merely wildlife.

It is an unlicensed subcontractor.

END OF SECTION 11