---
title: Troubleshooting | Velit Customer Support
description: If you are having issues with your Velit Cooling or Heating product here are self-help resources for you.
---

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1. [Velit Customer Support](https://help.velitcamping.com/help-articles)
2. [Troubleshooting](https://help.velitcamping.com/help-articles/troubleshooting)

# Troubleshooting

 If you are having issues with your Velit Cooling or Heating product here are self-help resources for you.

## Heater Troubleshooting

- [Error 07 - Velit Air Heater Fuel Pump Error](https://help.velitcamping.com/help-articles/error-07-velit-air-heater-fuel-pump-error)
- [Velit Heater Error 01/Error 02/ Smoke](https://help.velitcamping.com/help-articles/why-is-my-brand-new-heater-giving-me-error-01-or-error-02-codes)
- [Velit Air Heater Error 13 Fan Speed Abnormal or Error 08 Fan Motor](https://help.velitcamping.com/help-articles/velit-air-heater-error-13-fan-speed-abnormal-or-error-08-fan-motor)
- [Understanding ECU Firmware Versions for Velit Gas / Diesel Air Heater](https://help.velitcamping.com/help-articles/understanding-ecu-firmware-versions-for-velit-gas-/-diesel-air-heater)
- [Troubleshooting Fuel Line / Fuel Delivery Issues with Velit Gasoline / Diesel Air Heaters](https://help.velitcamping.com/help-articles/troubleshooting-fuel-line-/-fuel-delivery-issues-with-velit-gasoline-/-diesel-air-heaters)
- [Velit Air Heater Does Not Start After Pressing 2S to Start](https://help.velitcamping.com/help-articles/velit-air-heater-does-not-start-after-pressing-2s-to-start)
- [Check Heater Wiring Harness & ECU for Electrical Issues](https://help.velitcamping.com/help-articles/check-harness-ecu-for-electrical-issues)
- [What Size Fuel Line and Connectors for Velit Gas or Diesel Air Heaters?](https://help.velitcamping.com/help-articles/what-size-fuel-line-and-connectors-for-velit-gas-or-diesel-air-heaters)
- [How to Clean a Velit Gas or Diesel Air Heater](https://help.velitcamping.com/help-articles/how-to-clean-a-velit-gas-or-diesel-air-heater)
- [My Velit Heater Thermostat Controller is Dark or Won't Light Up](https://help.velitcamping.com/help-articles/my-velit-heater-thermostat-controller-is-dark-or-wont-light-up)
- [Fuel Filter Installation Considerations for Gas or Diesel Air Heaters](https://help.velitcamping.com/help-articles/fuel-filter-installation-consideration-for-gas-or-diesel-air-heaters)
- [Velit Air Heater Glow Plugs - All you need to know about them](https://help.velitcamping.com/help-articles/velit-air-heater-glow-plugs-all-you-need-to-know-about-them)
- [Extending Velit Air Heater Power Wires to Reach Battery](https://help.velitcamping.com/help-articles/extending-velit-air-heater-power-wires-to-reach-battery)
- [Why does my Velit air heater controller say "Fuel Pump OFF" "Wait...."](https://help.velitcamping.com/help-articles/why-does-my-velit-air-heater-controller-say-fuel-pump-off-wait)
- [Gas Smell from Velit Air Heater](https://help.velitcamping.com/help-articles/gas-smell-from-velit-air-heater)
- [Velit Air Heater Installation Check-list](https://help.velitcamping.com/help-articles/velit-air-heater-installation-check-list)
- [Velit Gasoline Diesel Air Heater Error Code Guide](https://help.velitcamping.com/help-articles/velit-gasoline-diesel-air-heater-error-code-guide)
- [What is the expected operating surface temperature of the air heater mounting plate and exhaust?](https://help.velitcamping.com/help-articles/what-is-the-expected-operating-surface-temperature-of-the-air-heater-mounting-plate-and-exhaust)
- [How to check firmware versions on Velit air heater](https://help.velitcamping.com/help-articles/how-to-check-firmware-versions-on-velit-air-heater)
- [Why does my fuel pump only show 8 or 9 volts at the power connection?](https://help.velitcamping.com/help-articles/why-does-my-fuel-pump-only-show-8-or-9-volts-at-the-power-connection)
- [Should I update the firmware on my heater?](https://help.velitcamping.com/help-articles/should-i-update-the-firmware-on-my-heater)
- [How come I can’t clear error codes without resetting the power/fuse to my heater?](https://help.velitcamping.com/help-articles/how-come-i-cant-clear-error-codes-without-resetting-the-power/fuse-to-my-heater)

See less ▼

## A/C Troubleshooting

- [Why is my air conditioning compressor surging/so loud?](https://help.velitcamping.com/help-articles/why-is-my-air-conditioning-compressor-surging/so-loud)
- [Replace Display Control Panel on Velit 2000U Underbench Air Conditioner](https://help.velitcamping.com/help-articles/replace-display-control-panel-on-velit-2000u-underbench-air-conditioner)
- [What do do with your 2000U during an E5 error](https://help.velitcamping.com/help-articles/what-question-is-your-article-answering)
- [How do I replace my 2000U Condenser or Evaporator fan?](https://help.velitcamping.com/help-articles/how-do-i-replace-my-2000u-condenser-or-evaporator-fan)
- [Water damage, do you know what to do if water leaks through your rooftop AC?](https://help.velitcamping.com/help-articles/water-damage-do-you-know-what-to-do-if-water-leaks-through-your-rooftop-ac)
- [What do I do when my rooftop unit has an EF error?](https://help.velitcamping.com/help-articles/what-do-i-do-when-my-rooftop-unit-has-an-ef-error)
- [Velit 2000R Controller Replacement](https://help.velitcamping.com/help-articles/velit-2000r-controller-replacement)
- [How do I replace my Rooftop Evaporator (or Blower) fan?](https://help.velitcamping.com/help-articles/how-do-i-replace-my-rooftop-evaporator-or-blower-fan)
- [How do I replace my Rooftop Condenser fan?](https://help.velitcamping.com/help-articles/how-do-i-replace-my-rooftop-condenser-fan)
- [Diagnosing Velit AC Not Blowing Cold](https://help.velitcamping.com/help-articles/diagnosing-velit-ac-not-blowing-cold)
- [Velit Air Conditioner Error Codes](https://help.velitcamping.com/help-articles/velit-air-conditioner-error-codes)
- [What is that noise?](https://help.velitcamping.com/help-articles/what-is-that-noise-)
- [Why won't my compressor start?](https://help.velitcamping.com/help-articles/why-wont-my-compressor-start)
- [How to Fix Rooftop Air Conditioner Unit that is  Short Cycling](https://help.velitcamping.com/help-articles/how-to-fix-rooftop-air-conditioner-unit-that-is-short-cycling)
- [How to replace broken rooftop AC cold air directional output vents](https://help.velitcamping.com/help-articles/how-to-replace-broken-rooftop-ac-cold-air-directional-output-vents)
- [2000R Blower Fan Replacement](https://help.velitcamping.com/help-articles/2000r-blower-fan-replacement)
- [Velit Rooftop AC Brushless EB Error: Controller lack-phase](https://help.velitcamping.com/help-articles/velit-rooftop-ac-brushless-eb-error-controller-lack-phase)
- [Does my Velit Rooftop AC unit have a Brushed or Brushless evaporator fan?](https://help.velitcamping.com/help-articles/does-my-velit-rooftop-ac-unit-have-a-brushed-or-brushless-evaporator-fan)
- [Velit 2000U EF or E8 Error Due to Fan Rubbing](https://help.velitcamping.com/help-articles/velit-2000u-ef-or-e8-error-due-to-fan-rubbing)
- [2000R Water Intrusion Fix for EF Error](https://help.velitcamping.com/help-articles/2000r-water-intrusion-fix-for-ef-error)

See less ▼

- [Troubleshooting](https://help.velitcamping.com/help-articles/troubleshooting#main-content)

    - [Heater Troubleshooting](https://help.velitcamping.com/help-articles/troubleshooting#heater-troubleshooting)
    - [A/C Troubleshooting](https://help.velitcamping.com/help-articles/troubleshooting#a-c-troubleshooting)
- [Product Manuals](https://help.velitcamping.com/help-articles/product-manuals#main-content)

    - [Velit Air Heater Manuals](https://help.velitcamping.com/help-articles/product-manuals#velit-air-heater-manuals)
    - [Velit Air Conditioner Manuals](https://help.velitcamping.com/help-articles/product-manuals#velit-air-conditioner-manuals)
- [FAQs](https://help.velitcamping.com/help-articles/faqs#main-content)

    - [Velit Air Conditioner FAQs](https://help.velitcamping.com/help-articles/faqs#velit-air-conditioner-faqs)
    - [Velit Air Heater FAQs](https://help.velitcamping.com/help-articles/faqs#velit-air-heater-faqs)
    - [Comvolt Power Station FAQ](https://help.velitcamping.com/help-articles/faqs#comvolt-power-station-faq)
- [General](https://help.velitcamping.com/help-articles/general)
- [Shipping & Fulfillment](https://help.velitcamping.com/help-articles/shipping-fulfillment)
- [Product Questions](https://help.velitcamping.com/help-articles/product-questions#main-content)

    - [Velit Air Heater Product Questions](https://help.velitcamping.com/help-articles/product-questions#velit-air-heater-product-questions)
    - [Velit Air Conditioner Product Questions](https://help.velitcamping.com/help-articles/product-questions#velit-air-conditioner-product-questions)

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